Nonlocal Coulomb correlations in pure and electron-doped Sr2IrO4: Spectral functions, Fermi surface, and pseudo-gap-like spectral weight distributions from oriented cluster dynamical mean-field theory - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Physical Review Materials Année : 2018

Nonlocal Coulomb correlations in pure and electron-doped Sr2IrO4: Spectral functions, Fermi surface, and pseudo-gap-like spectral weight distributions from oriented cluster dynamical mean-field theory

Résumé

We address the role of nonlocal Coulomb correlations and short-range magnetic fluctuations in the high-temperature phase of Sr2IrO4 within state-of-the-art spectroscopic and first-principles theoretical methods. Introducing an “oriented-cluster dynamical mean-field scheme”, we compute momentum-resolved spectral functions, which we find to be in excellent agreement with angle-resolved photoemission spectra. We show that while short-range antiferromagnetic fluctuations are crucial to accounting for the electronic properties of Sr2IrO4 even in the high-temperature paramagnetic phase, long-range magnetic order is not a necessary ingredient of the insulating state. Upon doping, an exotic metallic state is generated, exhibiting cuprate-like pseudo-gap spectral properties, for which we propose a surprisingly simple theoretical mechanism.
Fichier principal
Vignette du fichier
1801.08916 (3.75 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-01756961 , version 1 (08-01-2024)

Identifiants

Citer

Cyril Martins, Benjamin Lenz, Luca Perfetti, Véronique Brouet, François Bertrand, et al.. Nonlocal Coulomb correlations in pure and electron-doped Sr2IrO4: Spectral functions, Fermi surface, and pseudo-gap-like spectral weight distributions from oriented cluster dynamical mean-field theory. Physical Review Materials, 2018, 2 (3), pp.032001(R). ⟨10.1103/PhysRevMaterials.2.032001⟩. ⟨hal-01756961⟩
309 Consultations
4 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More